[mercury-users] gcc-3.3 on MacOS X Intel

[Jonathan Morgan]

On 8/18/07, Michael Day <mikeday at yeslogic.com> wrote:
> Hi Tom,
>
> > I compiled mercury-compiler-rotd-2007-07-27 with gcc 4.0.1 on OS X
> > 10.4.10, Intel by adding EXTRA_CFLAGS=-O0 to Mmake.params. There is a
> > package for Mercury 0.13.1 in MacPorts (http://www.macports.org) but I
> > haven't tried to install it.
>
> Does this mean that -O0 will be applied to programs compiled with the
> Mercury compiler as well as the Mercury compiler itself? That sounds
> like it could have scary performance implications.

>From memory, Mmake.params applies to the compiler, but not to programs
compiled with the compiler.  Also note that this is C's O0.
Presumably Mercury can still use any optimisation level it likes.  I
would imagine that C's optimisations would not have as much effect on
the final performance as Mercury's optimisations, but I'm not really
sure.

Jon
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